That article isn't convincing to me. IQ testing has known issues and if they didn't control for age then the assertion might apply to the general populace right

That article isn't convincing to me. IQ testing has known issues and if they didn't control for age then the assertion might apply to the general populace right now but not as a general trend that will hold over time, especially since Millennials and Gen Z together are much larger than Boomers. The fertility argument is dumb IMO because while intelligence is heritable, environmental factors and education play at least as large of a role in ability to perform on an IQ test. Also that trend, if it is anything other than a blip (because the wealthiest may actually tend to have more children) just began do there would not be much reason to think gene shift would be a strong factor in IQ trends. https://qz.com/1125805/the-reason-the-richest-women-in-the-us-are-the-ones-having-the-most-kids/ https://qz.com/1125805/the-reason-the-richest-women-in-the-u...